Hybrid Vehicle Positioning System with Wireless Error Correction
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Solution Overview
Problem
Current GPS-based vehicle positioning systems suffer from imprecision, leading to inaccurate location sensing and potential misjudgments, especially when fleet members are near large objects or in areas with obstructed satellite signals, affecting fleet management and drop-out monitoring.
Innovation Solution
An automatic vehicle positioning management system that combines GPS positioning with wireless positioning technology, using on-vehicle and portable devices to generate and correct positioning data through point error analysis, image overlay, and point error correction, integrating the advantages of both methods for enhanced accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If GPS positioning is used for fleet member location determination, then the system can provide positioning data with wide coverage, but the positioning precision deteriorates due to signal blockage and imprecision (1-20 feet)
Solution Approach 1:
The patent combines GPS positioning with wireless positioning technologies to create a hybrid positioning system. The GPS module provides wide coverage positioning data while wireless positioning modules (using WiFi, Bluetooth, or cellular signals) provide high-precision correction data. This merging resolves the contradiction by maintaining the coverage advantage of GPS while adding the precision advantage of wireless positioning through data fusion and error correction algorithms.
2Area of stationary object
If GPS positioning is used for fleet management, then the system can track members over large areas, but the reliability deteriorates when members are near large objects that block satellite signals
Solution Approach 1:
The patent introduces wireless positioning signals (WiFi, Bluetooth, cellular) as intermediary positioning methods when GPS signals are blocked by large objects. These wireless signals can penetrate or work around obstructions that block satellite signals, providing alternative positioning data that maintains reliability in urban canyons, indoor environments, or areas near large structures while preserving the wide tracking area capability of GPS.
3Device complexity
If only GPS positioning is used, then the system structure remains simple, but the positioning data accuracy deteriorates due to inherent GPS imprecision
Solution Approach 1:
The patent changes the positioning parameters by introducing additional positioning data sources (wireless positioning modules) and their corresponding correction parameters. The system collects multiple positioning data streams with different characteristics (GPS for coverage, wireless for precision) and uses parameter fusion algorithms to optimize the combined positioning result, thereby improving precision while managing complexity through systematic parameter integration.
Data Source
AI summary
An automatic vehicle positioning management system includes an on-vehicle apparatus and a portable device. The on-vehicle apparatus, installed on a vehicle, acquires a first location of the vehicle through wireless positioning. The first location is sent to the portable device which acquires a second location of the vehicle through GPS. When multiple vehicles form a fleet, each vehicle respectively sends its first and second locations to a server through its portable device. The second location of each vehicle is corrected by operations of point error analysis, image overlay and point error correction, so that the fleet can be managed more precisely.